Question

Noise cancelling headphones eliminate outside noise by combining the original sound wave with a wave produced when the original sound wave is inverted. Explain how this cancels out the wave. You must use the terms interference and superposition your response.

Answer 1

To reduce or cancel out noise, research has shown that superimposing a sound wave and and the wave produced when the sound wave is inverted, cancels the sound by creating a destructive interference of the two waves. Destructive interference occurs when the troughs of the sound wave superimposes with the crest of the inverted wave canceling out the sound wave. This research shows great potential in the automobile industry for canceling out noise fro mthe exhaust vent.

Answer 2

By superposition of two waves that are out of phase.

Step-by-step explanation:

Sound waves can be , in fact, are thought of as waves which mean they have troughs and crests as in any wave. so as it is a fact that two waves that are out of phase, that means trough of one as at the crest of another, will cancel each other when combined or super-imposed.

trough in any wave is point of minimum amplitude and crest is point of maximum amplitude.

In noise cancelling headphones if outer noise is super imposed with a nother sound eminated inside headphones that is completly out of phase then the noise will get cancelled.

here inverted refers to original sound being out of phase.